Plastic sheets for concrete reinforcing mesh

ABSTRACT

Foamed plastic sheets interlock to form a continuous slab which is laid on the road bed or the like prior to pouring concrete to seal the concrete from the road bed. Chairs or the like are formed on the upper surface of the sheets to support reinforcing mesh at the required height above the sheets.

0 United States Patent us] 3,678,643 Schwarz [4 1 July 25, 1972 s41PLASTIC SHEETS FOR CONCRETE 3,339,325 9/1967 Knapp ......s2/3o9REINFORCING MESH 3,220,l5l ll/l965 Goldman... ....52/309 3,410,044 I[/1968 Moo; ....52/309 Inventor: ABM nm S Paul 3,552,076 um: Gregori..s2/309 Ave., Winnipeg l0, Manitoba, Canada FOREIGN PATENTS ORAPPLICATIONS [22] Filed: June [8,1970

l,564,8l6 3/l968 France ..$2/577 [2!] Appl. No.: 47,192

Primary Examiner-John E. Murtagh 52 u s Cl. 52/686 [5!] Int. Cl. ..E04c5/16 [58] FleldotSeerch ..52l309, 677, 687, 577, 576, [57] ABSTRACT52/405. 6l2, 600, 602, 686 Foamed plastic sheets interlock to form acontinuous slab which is laid on the road bed or the like prior topouring [56] Ram CM concrete to real the concrete from the road bed.Chairs or the like are formed on the upper surface of the sheets tosupport UNITED STATES PATENTS reinforcing mesh at the required heightabove the sheets.

3,000,l44 9/1961 Kitson ..52I309 1 Claim, 6 Drewlng Figures PatentedJuly 25, 1972 3,678,643

FIG. 3 INVENTOR ALFRED V. SCHWARZ ATTORNEY PLASTIC SHEETS FOR CONCRETEREINFORCING MESH This invention relates to new and useful improvementsin means for supporting reinforcing mesh for concrete or the like and atthe same time providing an insulating sheet between the concrete and thetill material upon which the concrete is being poured.

The advantage of this seal or insulating sheet is that it not onlyinsulates the concrete from heat or cold but also prevents hydraulicpressure from bearing directly upon the poured concrete.

Another object of the invention is to provide a device of the characterherewithin described which provides means for installing integrally withthe sheet, chairs to support the steel reinforcing mesh thepredetermined height from the surface upon which the concrete is beingpoured.

Another object of the invention is to provide a device of the characterherewithin described which can be used equally as well for pouringceilings, the surface forming the ceiling being formed from a plasticsheet which is easily finished.

Yet another object of the invention is to provide a device of thecharacter herewithln described which consists of a plurality of plasticfoam sheets interlocking with one another to form a sealed surface andhaving chairs formed on one surface thereof to support reinforcing steelmesh for concrete.

With the foregoing in view, and such other or huther purposes,advantages or novel features as may become apparent from considerationof this disclosure and specification, the present invention consists of,and is hereby claimed to reside in, the inventive concept which iscomprised, embodied, embraced, or included in the method, procea,construction, composition, arrangement or combination of parts, or newuse of any of the foregoing, of which concept, one or more specificembodiments of same are herein exemplified as illustrative only of suchconcept, reference being had to the accompanying figures in which:

FIG. I is an isometric view of one of the sheets.

FIG. 2 is an end view of FIG. 1 showing the reinforcing steel in place.

FIG. 3 is a plan view psrtly schematic showing a plurality of sheetswith reinforcing mesh supported thereon.

FIG. 4 is an enlarged fragmentary view showing one form of joint betweenadjacent sheets.

FIG. 5 is a view similar to FIG. 4 but showing a modification thereof.

FIG. 6 is an enlarged view, partly in section and partly in elevation,showing one of the chairs.

in the drawings like characters of reference indicate correspondingparts in the different figures.

Proceeding therefore to describe the invention in detail,

reference character It) illustrates a sheet of polyurethanefoamorthelikeandalthoughsieelsnotofimportance. nevertheless it hconsidered convenient to manufacture these sheets in Zfeet X 4 feetdimensions.

Meat! are provided around the perlmetrical edges of the sheet [0 toenable adjacent sheets to interlock and form a seal. FIG. 4 shows onesuch means in which two edges ofthe sheet are formed with an extendingcentrally located shoulder 11andtheothertwoedgesareformedwithamatingrecesaor groove 12 so that whenthe edges are engaged together, the shoulder 11 fits within the me. 12thus holding the sheets in a sealed position.

FIG. 5 shows a conventional ship-lap joint illustrated by referencecharacter 13.

Normally the polyurethane foam or similar material does not needsurfacing but, if desired, one surface may be provided with a plasticsheet 14 during manufacture as shown in FIG. 5 or, alternatively, bothsurfaces may be formed from a plutic sheet with the foam 1!therebetween. This is also shown in FIG. 5.

Formed on the upper surface 16 of the sheets is a plurality of plasticchairs [7 adapted to receive conventional concrete reinforcing steel ormesh 18 and to support same at a ned height above the upper surface 16.This is FIGS. 2 and 3 so that when concrete is poured, the

predetermi shown in mesh is automatically positioned to provide theoptimum strength and does not require the usual pulling up through theconcrete. Slots 17' are provided in the chairs having enlarged lowerends 17A. The slots are at right angles to one another and allow thereinforcing steel snaps into position and is held firmly.

When a floor or ceiling is poured with a completely sealed sheet 10, itacts as an insulator and also acts to prevent or release hydraulicpressure upon the poured floor.

Various modifications can be made within the scope of the inventiveconcept which is herein disclosed and/or claimed.

What I claim as my invention is:

I. An insulating base and reinforcing rod support for concrete floorsand pavemenu, comprising in combination a horizontally disposed sheet offoamed synthetic plastic material adapted to be positioned on a surfaceon which concrete is to be poured and to remain in situ after pouring,and a plurality of upwardly projecting knob-like chairs formedintegrally with said sheet and disposed on the upper surface of thesheet in a pattern of spaced parallel intersecting rows, each of saidchairs being formed with a CWIIGPGd slot coincident with theintersection of said rows, said slot being open at the top and sides ofthe chair and the bottom of the cross-shaped slot in each chair isenlarged for a snap reception and support of reinforcing rods at rightangles to each other.

i O O G i

1. An insulating base and reinforcing rod support for concrete floors and pavements, comprising in combination a horizontally disposed sheet of foamed synthetic plastic material adapted to be positioned on a surface on which concrete is to be poured and to remain in situ after pouring, and a plurality of upwardly projecting knob-like chairs formed integrally with said sheet and disposed on the upper surface of the sheet in a pattern of spaced parallel intersecting rows, each of said chairs being formed with a cross-shaped slot coincident with the intersection of said rows, said slot being open at the top and sides of the chair and the bottom of the cross-shaped slot in each chair is enlarged for a snap reception and support of reinforcing rods at right angles to each other. 